What's New
Upgrade to iOS 14, watchOS7
App Description
In probability theory the Chi-Square Distribution with n degrees of freedom is the distribution of a sum of the squares of n independent standard normal random variables defined as variable x
Chi-Square Distribution Integral Calculator calculates a table of (x,n)/F(x) value pairs from an interactive input of (x,n) and increment variables.
Arguments for the Chi-Square Distribution Integral.
x: The upper limit of the integral of the density function.
n: The number of degrees of freedom.
The (n) argument has a slider method of data input with a range of 1-20 degrees of freedom (df).
Chi-Square Distribution Integral Calculator also displays a graph for the (x,n)/F(x) generated values
The graphs are touch enabled graph. Upon touching the graph a vertical line appears. Move the vertical line to the left or right to display the point Pr(x) and the Chi Square Distribution PDF and CDF data pairs.
The horizontal x-axis displays x values. The vertical y-axis plots a range of either the CDF and PDF values
Horizontal Max and Min dashed lines display the Maximum and Minimum values.
iPhone Screenshots
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iPad Screenshots
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App Changes
- September 04, 2014 Initial release
- March 13, 2015 New version 1.1
- April 27, 2015 New version 1.2
- January 27, 2016 New version 1.3
- November 07, 2016 New version 1.4
- June 15, 2019 New version 1.5
- January 14, 2020 New version 1.6
- October 27, 2020 New version 1.7
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